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    <title>Document</title>
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<body>
    <script>
        let x = 'aaa'
      // 如果包含特殊字符返回false
        function check(str) {
            let patrn = /[`~!@#$%^&*()_\-+=<>?:"{}|,.\/;'\\[\]·~！@#￥%……&*（）——\-+={}|《》？：“”【】、；‘'，。、]/im;
            if (!patrn.test(str)) {
                return true;
            }
            return false;
        }


        console.log(check(x));
    </script>
</body>

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